3 files changed, 3 insertions, 3 deletions
diff --git a/matrix-specification/Data/Filters/EventFilter.php b/matrix-specification/Data/Filters/EventFilter.php
index 98788ad..cd8fdf2 100644
--- a/matrix-specification/Data/Filters/EventFilter.php
+++ b/matrix-specification/Data/Filters/EventFilter.php
@@ -31,6 +31,6 @@ class EventFilter implements \JsonSerializable
       "not_types" => $this->notTypes,
       "senders" => $this->senders,
       "types" => $this->types,
-    ], "is_null");
+    ], fn ($value) => ! is_null($value));
   }
 }
diff --git a/matrix-specification/Data/Filters/RoomEventFilter.php b/matrix-specification/Data/Filters/RoomEventFilter.php
index 915c9a0..b7ce87b 100644
--- a/matrix-specification/Data/Filters/RoomEventFilter.php
+++ b/matrix-specification/Data/Filters/RoomEventFilter.php
@@ -45,6 +45,6 @@ class RoomEventFilter extends EventFilter
       "not_rooms" => $this->notRooms,
       "rooms" => $this->rooms,
       "unread_thread_notifications" => $this->unreadThreadNotifications,
-    ], "is_null");
+    ], fn ($value) => ! is_null($value));
   }
 }
diff --git a/matrix-specification/Data/Filters/RoomFilter.php b/matrix-specification/Data/Filters/RoomFilter.php
index dd110bd..fe741c5 100644
--- a/matrix-specification/Data/Filters/RoomFilter.php
+++ b/matrix-specification/Data/Filters/RoomFilter.php
@@ -34,6 +34,6 @@ class RoomFilter
       "rooms" => $this->rooms,
       "state" => $this->state,
       "timeline" => $this->timeline,
-    ], "is_null");
+    ], fn ($value) => ! is_null($value));
   }
 }